Cupola.



"PATENTED MAY 8, 1906.

No. 820,167. 7 W. S. ANDERSON.

UPOLA APPLICATION FILED AUG. 28, 1905.

UNITED STATES PATENT OFFICE.

CUPOLA.

Specification of Letters Patent.

Patented May 8, 1906.

Application filed August 28, 1905. Serial No. 276,034.

To all whom, it may concern.-

Be it known that I, WINFIELD S. ANDER- SON, a citizen of the United States, residing at Cincinnati, Hamilton county, State of Ohio, have inventedcertain new and useful Improvements in Cupolas; and I do declare the following to be a clear, full, and exact description of the invention, attention being called to the accompanying drawings, with the reference characters marked thereon, which form also a part of this specification.

This invention relates to improvements in devices for smelting and reducing ore or for melting metal, as is done in.blast-furnaces, cupolas, &c.; and it relates moreparticularly to such where a vaporized liquid fuel or hydrocarbonlike crude oil, for instanceis used as fuel.

The invention. embraces features relating to the general construction, means for vaporizing the hydrocarbon, and devices for regulating the supply of the same. These features of my invention are arranged and constructed in a manner to permit their installation and provision in connection with existing furnaces without requiring extensive alterations or disturbance of prevailing arrangements.

In the following specification and claims at the end thereof is found a full description of my invention, together with its parts, their 0 eration and construction, which latter is a so illustrated in the accompanying drawings, which show my invention in connection with a customary cupola, and in which draw- 1ngs Figure 1 shows the lower part of such a cupola, partly in elevation and partly in section and provided with the improvements contemplated by my invention. Fig. 2 is part of a horizontal section of Fig. 1. Fig. 3

is a detail View of the means for regulating the air-blast passing through the twyers.

In the drawings, 10 indicates the general wall of the structure, the same forming an inclosure which receives the charge (ore or metal) through a charging-door 11 to be re duced or melted in the lower part or working chamber 12 of the inclosed space where such charge comes in contact with heat and fuel. In cupolas this wall usually rests upon a substructure consistingof a base 13 and pillars 14. The molten metal is drawn off through a customary tap-hole. (Not shown.) Air is blown into the working chamber through twyers 15, provided in the inclosing wall 10,

and whereby the melting efiects of the combustion are intensified. The air for this blast is supplied in any suitable Way. Usually an annular chamber 16 is provided to surround wall 10 outside of the working chamber, the inclosed space being customarily known as the wind-box and with which space the outer ends of all the twyers are in open communication, so that the air from this box may simultaneously pass through all twyer-openings' The wind-box is supplied through apipe 17 from a suitable source,

ike a blower or air-compressor.

As before stated, the fuel is presumed to be a hydrocarbon-like crude oil, for instancewhich is supplied by burner-pipes 18 and discharges through burner-nozzles 19 into working chamber 12. These burner-nozzles enter this latter through the twyers, so that an 'existing coal or coke burning structure may be readily converted into an oil-burning one and provided with the necessary outfit for this purpose without requiring cutting of holes to admit the burner-nozzles, since these latter may enter through the existing twyers. The burner-pipes are supplied from feed-pipes 20, which supply is controlled by suitable valves 21. These feed-pipes are all in communication with and start from a vaporizing-pipe 22, which lies closely around the outside of the furnace-wall, so as to be heated thereby, and whereby the oil contained in it is also heated and converted more or less into vapor. This conversion may be aided by providing heaters in form of short pipe-spurs 23, capped at their outer end, but open to pipe 22, and embedded in the furnace-wall, where a higher degree of heat prevails. They may also constitute the means to hold pipe 22 in position. A general supply-pipe 24, controlled by a valve 25, brings the oil to the furnace, the flow being induced by pump or gravity. A gage 26 indicates the pressure within the generating-pipe 22, and to guard against accidents I provide a weight or spring controlled safety-valve 27, any blow-01f being received by a pipe 28, whereby it is returned to the general supply. The air passing through twyers 15 may be controlled and regulated, for which purpose I provide curtain-valves 29, one being above each opening and each connected to a rod 31, which is supported in the furnace wall and in the outer wall of the air-chamber and provided outside of this latter witha handle 32 for manipulation, which is by adjusting it across a twyer- IIO opening, as best shown in Fi 3. The burnerpipes 18 are bent according y to permit said valves 29 to close the larger part of a twyeropening; but within said opening each pipe is bent toward the center again, so as to cause the oil and vapor to discharge centrally from the twyer-openings.

The escape of the heat is retarded by an annular check 33 to concentrate its action and to intensify its effect on the matter to be reduced.

Having described my invention, I claim as new 1. In a cupola or similar device fitted for using liquid fuel, the combination of a working chamber, a fuel-heating pi e arranged around the wall which surround this working chamber and provided with communicating, inwardly-projecting heating-spurs which are embedded into this wall so heat therefrom, means to supply a hydrocarbon to this pipe and its spurs so as to be preheated therein, burner-nozzles arranged to as to derive discharge into the working chamber and feedpipes connecting them with the fuel-heating 1 e. p In a'cupola or similar device fitted for using liquid fuel, the combination of a working chamber, a fuel-heating pipe around the outside of the same which has inwardly-projectin communicating pipe-spurs which are embeiIded in the adjacent chamber-wall for the purpose of sup orting the fuel-heating pipe which surroundg this wall so as to derive eat therefrom, means to convey a hydrocarbon to this heating-pipe to be preheated therein, burner-nozzles arranged to discharge into the working chamber and feed-pipes connecting them with the fuel-heating pipe. In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

WIN FIELD S. ANDERSON. Witnesses:

C. SPENGEL, HOMER BRADFORD. 

